CN102136780B - Totally enclosed motor - Google Patents
Totally enclosed motor Download PDFInfo
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- CN102136780B CN102136780B CN2011100295714A CN201110029571A CN102136780B CN 102136780 B CN102136780 B CN 102136780B CN 2011100295714 A CN2011100295714 A CN 2011100295714A CN 201110029571 A CN201110029571 A CN 201110029571A CN 102136780 B CN102136780 B CN 102136780B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/08—Arrangements for cooling or ventilating by gaseous cooling medium circulating wholly within the machine casing
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K1/00—Details of the magnetic circuit
- H02K1/06—Details of the magnetic circuit characterised by the shape, form or construction
- H02K1/22—Rotating parts of the magnetic circuit
- H02K1/32—Rotating parts of the magnetic circuit with channels or ducts for flow of cooling medium
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K9/00—Arrangements for cooling or ventilating
- H02K9/14—Arrangements for cooling or ventilating wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle
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- Power Engineering (AREA)
- Motor Or Generator Cooling System (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
A totally enclosed motor which includes a rotor disposed inside a housing and a heat of the rotor is transferred to the housing, a stator disposed inside the housing and a heat of the stator is transferred to the housing, and an inner fin which is disposed in the rotor and agitates air inside the housing. The totally enclosed motor is cooled by a forced convection by an outer fan disposed outside the housing, or by a natural convention in the vicinity of an outer surface of the housing, and a shape of the rotor is different between one end side and the other end side of the rotor in an extending direction of a rotary shaft of the rotor.
Description
Technical field
The present invention relates to totally-enclosedmotor, especially relate to its cooling structure.
Background technology
Fig. 9 is the axial longitudinal section of totally-enclosedmotor 100 in the past.
As shown in Figure 9, in the past, totally-enclosedmotor 100 was the structures of accommodating the part of the rotating shaft 103 that is connected by the rotor 101 of electricity generator tool revolving force, stator 102, with rotor 101 one and the revolving force that produces is transmitted to the outside in the inside of the housing 105 that is made of framework 105f or end breaket 105e in the mode that peristome is not set and rotating shaft 103 being carried out the bearing 104 of axle supporting.
Totally-enclosedmotor 100 is not owing to arrange peristome, therefore has the dust that prevents outer gas or dust is invaded and the effect of sound insulation.
The isocaloric cooling of iron loss that totally-enclosedmotor 100 produces is undertaken by following mechanism shown in Figure 10.Figure 10 is the figure that flows of heat that the totally-enclosedmotor 100 of Fig. 9 is shown.
The heat that is produced by rotor 101 mainly transmits at the rotating shaft 103 that is connected with rotor 101 one with the bearing 104 that rotating shaft 103 axles are supported on housing 105 by the heat conduction, and to housing 105 transmission.The heat that produces at stator 102 sends housing 105 at the position that the inwall of the peripheral part of stator 102 and housing 105 joins to by heat, and sends housing 105 to by heat such as radiation when there is the gap in the inwall of the peripheral part of stator 102 and housing 105.
In addition, the heat that is discharged to by convection current or radiation the space of housing 105 inside from the surface of rotor 101 or stator 102 is heated the air of the inside of housing 105.The air that the quilt of the inside of this housing 105 is heated is stirred the heat transferred housing 105 of the air that this quilt is heated by the internal cooling fin 106 (hereinafter referred to as inner fin 106) that is installed on the rotor 101 with the rotation of rotor 101 one.
In an end side of the bearing of trend of the rotating shaft 103 of housing 105 outsides, external refrigeration fan 108 (hereinafter referred to as external fan 108) is covered by the end fan cover 107 with ventilation intake and draft outlet, and is fixedly installed on the rotating shaft 103.External fan 108 is created in the cooling air that flows in fin (not shown) surface on the outer peripheral face that is formed at housing 105 by the rotation of rotor 101, thereby is discharged by the outside gas of heat that cooling air will pass to housing 105 by fin.At this moment, end fan cover 107 is so that the cooling air that external fan 108 produces blows to the fin on the housing 105 and the mode cooled off efficiently covers on the axial periphery of housing 105 locally, and towards fin guiding cooling air.On the other hand, when not having external fan 108, the heat that passes to housing 105 is discharged by from the free convection on housing 105 surfaces and outside gas.
Yet, be arranged at the inner fin 106 of rotor 101 owing to have the characteristics of moulding easiness and have same whipping performance with respect to positive and negative rotation, therefore the tabular fin 106a that forms vertical plane in the both ends side of the bearing of trend of the rotating shaft 103 of rotor 101 is parallel to the bearing of trend of rotating shaft 103, and such as shown in Figure 11 to view of the D direction of the rotor 101 of Fig. 9, from rotating shaft 103 towards foreign side along the setting of radiation direction.
Yet, in the situation of the inner fin 106 of this structure, the central side of fin 106 sprays air towards the outside by centrifugal force internally, the air of the inside by stirring shell 105 and can obtain cooling effect, but owing near the fin 106a of inner fin 106 central side, produce turbulent flow, therefore the internally central side of fin 106 same flowing owing to turbulent flow is upset toward the outer side, thereby the efficiency of cooling existing problems.
Figure 12 is the longitudinal section that flows by near the air the inner fin 106 of the totally-enclosedmotor in the past 100 of arrow presentation graphs 9.
Shown in the arrow of Figure 12 as can be known, the air that stirs by inner fin 106 only circulates near the space inner fin 106, around the coil-end 109 and the wind speed between the housing 105 extremely reduce, thereby the space of housing 105 inside is not cooled off uniformly.
In addition, in the small gap between rotor 101 and stator 102, the almost not load-side 110 in the housing 105 of the side that is provided with motor load of axial (left and right directions in the paper of Figure 12) end of rotor 101 and stator 102 and load opposition side 111 these both sides ventilation of coming and going, therefore inner fin 106 in housing 105 load-side 110 and the space of load opposition side 111 in independently stir respectively, only can obtain the cooling effect of locality and not carry out high efficiency cooling.
Structure with respect to this inner fin 106, rise to purpose with cooling performance, following method is disclosed in patent documentation 1, the method is: shown in Figure 13 such as the axial cutaway view of rotor 201, in the rotor 201 of the cage type motor that possesses end ring (end ring) 212, such as shown in Figure 14 to view of the E direction of the rotor 201 of Figure 13, conductor 213 is tilted to the direction opposite with direction of rotation 214, and this conductor 213 is positioned at than end ring 212 and is inserted into rotor 201 inside in the outer part and in the mode that connects along rotating shaft 203 directions.Consequently, by being positioned at the rotation than end ring 212 conductor 213 in the outer part, and increase the mixing power in the space of motor interior.
In addition, in the totally-enclosedmotor 300 of patent documentation 2, disclose following method, the method is: shown in Figure 15 such as its axial longitudinal section, on rotor 301 and stator 302, ventilation hole 351,352 is set respectively, and in the inside of totally-enclosedmotor 300, forcibly make the air circulation of housing 305 inside by be connected the internal cooling fan 316 (hereinafter referred to as fan inside 316) that arranges with rotating shaft 303.
Patent documentation 1: Japanese kokai publication sho 58-207849 communique (the first figure etc.)
Patent documentation 2: the real clear 61-43765 communique (the first figure etc.) of opening of Japan
Yet, in recent years, quantize and the viewpoint of resource-saving from economizing, expect small-sized, the lightweight of motor, the requirement of totally-enclosedmotor is also improved.
When motor is carried out miniaturization, because more than the increase of the heat generation density that the increase of loop density causes and temperature rise to over, thereby must the raising cooling performance.Because the miniaturization meeting of rotor and stator produces the increase of the saturated copper loss that causes of the increase of coil resistance of the minimizing of following area of dissipation or magnetic flux, therefore inevitable electric loss increases.Therefore, the shortcoming that has the caloric value of rotor and stator self to increase, on the other hand, with respect to the miniaturization of housing or other structure member, dwindling etc. of the area of dissipation on structure member surface also becomes problem.
Therefore, the realization that surmounts the cooling structure of present cooling performance and cooling means becomes the large problem in the miniaturization of totally-enclosedmotor.
In patent documentation 1, propose to have a kind of by connecting the conductor 213 of rotor 201 shown in Figure 13 along rotating shaft 203 directions the change that structure is set, be the method that structure that the rightabout to direction of rotation of conductor 213 shown in Figure 14 tilts improves cooling performance.Yet this change need to be processed respectively end ring 212 and the conductor 213 that connects rotor 201, moulding, assembling, the possibility that therefore has manufacturing cost and component costs to increase.And, when rotor 201 carries out positive and negative rotation, owing to the conductor 213 of rotation forms different cooling effects with respect to the shape of air is different.In addition, with the cooling structure of the totally-enclosedmotor of having deposited similarly owing to be that load-side 210 and the opposing party's side are that load opposition side 211 cools off respectively to side's side of the bearing of trend of rotating shaft 203, be high efficiency cooling structure hardly therefore.
In addition, in patent documentation 2, as shown in figure 15, although produce by ventilation hole 351,352 recycled air stream (with reference to the arrow of Figure 15) by fan inside 316 is set, but because the setting of fan inside 316, the length of the bearing of trend of rotating shaft 303 directions of totally-enclosedmotor 300 increases, and volume increases, cost increases, and therefore still leaves problem with respect to small-sized, lightweight.
Summary of the invention
The present invention is in view of above-mentioned actual conditions, and the cooling structure that its purpose is to provide the air of the enclosure interior of a kind of utilization by stirring Totally-enclosed-type to obtain cooling effect is realized totally-enclosedmotor small-sized and that cooling performance is high.
To achieve these goals, totally-enclosedmotor of the present invention possesses: be arranged in the housing and transmit rotor and the stator of its heat to described housing; Be formed on the described rotor and stir the inner fin of the air in the described housing, cool off by being arranged on forced convertion that the outer external fan of described housing produces or near the free convection the described housing outer surface, described rotor has different shapes in an end side of the bearing of trend of its rotating shaft with the other end side.
The invention effect
According to the present invention, can realize totally-enclosedmotor small-sized and that cooling performance is high.
Description of drawings
Fig. 1 (a) is the axial vertical section of the totally-enclosedmotor of the first execution mode of the present invention, (b) is that the A direction of rotor of totally-enclosedmotor of (a) is to view.
Fig. 2 is that the A direction of rotor of Fig. 1 (a) of the direction of rotation of rotor of expression the first execution mode and the wind direction around the inner fin is to view.
Fig. 3 is that the A direction of Fig. 1 (a) of the rotor of the second execution mode is to view.
Fig. 4 (a) is the axial longitudinal section of the totally-enclosedmotor of the 3rd execution mode, (b) is that the B direction of rotor of (a) is to view.
Fig. 5 is the axial longitudinal section of the totally-enclosedmotor of the 4th execution mode.
Fig. 6 is the axial longitudinal section of the totally-enclosedmotor of the 5th execution mode.
Fig. 7 (a) is the axial longitudinal section of the totally-enclosedmotor of the 6th execution mode, (b) is that the C direction of rotor of (a) is to view.
Fig. 8 is the axial longitudinal section of the totally-enclosedmotor of the 7th execution mode.
Fig. 9 is the axial longitudinal section of totally-enclosedmotor in the past.
Figure 10 is the figure that flows of heat that the totally-enclosedmotor in the past of Fig. 9 is shown.
Figure 11 is that the D direction of rotor in the past of Fig. 9 is to view.
Figure 12 is the longitudinal section that flows with near the air the inner fin of the totally-enclosedmotor in the past of arrow presentation graphs 9.
Figure 13 is the axial cutaway view of the rotor of patent documentation 1.
Figure 14 is that the E direction of rotor of patent documentation 1 of Figure 13 is to view.
Figure 15 is the axial longitudinal section of the totally-enclosedmotor of patent documentation 2.
Symbol description:
1,21,31,41,51,61,71 rotors (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
2,32,42,52,62,72 stators (constitutive requirements of totally-enclosedmotor)
3,23,33,43,53,63,73 rotating shafts (constitutive requirements of the rotating shaft of rotor, rotor constitutive requirements, totally-enclosedmotor)
5,35,45,55,65,75 housings (constitutive requirements of totally-enclosedmotor)
6,6a, 6b, 26,36,36a, 36b, 46a, 46b, 56a, 76a, 76b inner fin (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
8,38,48,58,68,78 external fans
9,29,39,49,59,69,79 coils (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
10 load-side (end side of the bearing of trend of rotating shaft or the other end side)
11 load opposition sides (the other end side of the bearing of trend of rotating shaft or an end side both ends side)
61e end ring (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
61d conductor (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
15a, 15a, 35a, 35b, 45a, 45b, 55a, 55b, 65a, 65b, 75b ventilation hole
75a ventilation hole (ventilation hole that tilts with respect to the bearing of trend of rotating shaft)
61,61a, 61b, 261,361a, 361b, 461a, 461b, 561a, 761a, 761b fin (constitutive requirements of rotor constitutive requirements, totally-enclosedmotor)
Z, 3Z, 4Z, 5Z, 6Z, 7Z totally-enclosedmotor
Embodiment
Below, with reference to the description of drawings embodiments of the present invention.
Need to prove that in addition the accompanying drawing that uses in the following description is schematic figure, should be noted that thickness is different with the situation of reality from the relation of planar dimension, the ratio of each layer thickness etc.Therefore, concrete thickness or size should be judged with reference to the following description.And, in mutual relation or the different part of ratio that certainly also comprises size each other of accompanying drawing.
Fig. 1 (a) is the axial vertical section of the totally-enclosedmotor Z of the first execution mode of the present invention, and Fig. 1 (b) is that the A direction of rotor 1 of totally-enclosedmotor Z of Fig. 1 (a) is to view.
The summary of the totally-enclosedmotor Z of the＜the first execution mode 〉
The totally-enclosedmotor Z of the first execution mode illustrates the air that rotor 1, stator 2 are carried out the inside of inaccessible housing 5 and is stirred the cooling structure of cooling by the rotation of rotor 1, provides a kind of and does not change the size of housing 5 and improve the mixing power of the inner air in the housing 5 and be created in the air stream that circulates in the space in the housing 5 and the high cooling structure of cooling performance.
Therefore, totally-enclosedmotor Z has inner fin 6 parallel with the rotating shaft 3 of rotor 1 and that arrange along the radiation direction centered by the pivot of rotating shaft 3 (rotor 1), shown in Fig. 1 (b), the fin 61 that consists of inner fin 6 is tilted to different directions from the radiation direction centered by the pivot of rotating shaft 3 in the both sides of the bearing of trend end of the rotating shaft 3 of rotor 1.In addition, totally-enclosedmotor Z arranges ventilation hole 15a, 15b, and described ventilation hole 15a, 15b connect load-side 10 and the load opposition side 11 in the housing 5 of the side be provided with motor load (not shown), thereby realizes the circulation of the air stream in the housing 5.
The overall structure of＜totally-enclosedmotor Z 〉
Totally-enclosedmotor Z shown in Fig. 1 (a) possesses: rotor 1, and it is fixed with magnet, rotating shaft 3 etc.; Stator 2, it has laminate core and coil 9, and this coil 9 is wound in this laminate core and electric current is flow through; Housing 5, its be provided with rotating shaft 3 supporting for rotation freely bearing 4 and cover rotor 1, stator 2 with respect to space outerpace; External fan 8, its outside at housing 5 are fixed in rotating shaft 3 and are used for the heat that passes to housing 5 is cooled off; End fan cover 7, it covers the part of external fan 8 and housing 5 and the wind that external fan 8 produces is guided towards housing 5.In addition, the heat that passes to housing 5 passes through the free convection of air from the outside gas heat radiation of the outer surface of housing 5.
Totally-enclosedmotor Z invades to inside and rotor 1 and stator 2 is housed in the inside of housing 5 for fear of the dust of outer gas, dust etc.
In addition, in Fig. 1 (a), the inside of housing 5 in that rotating shaft 3 is fixed with a side of motor load (not shown) among the totally-enclosedmotor Z is called load-side 10, the inside of the housing 5 of a side of fixed motor load not is called load opposition side 11.
In order to make load-side 10 and load opposition side 11 circulations of air in housing 5, wear the ventilation hole 15a that connects load-side 10 and load opposition side 11 at rotor 1.
Similarly, in order to make load-side 10 and load opposition side 11 circulations of air in housing 5, wear the ventilation hole 15b that connects load-side 10 and load opposition side 11 at stator 2.
The inner fin 6 of＜rotor 1 (6a, 6b) 〉
In totally-enclosedmotor Z, for the heat to rotor 1, stator 2 etc. cools off, be provided with inner fin 6 (6a, 6b) parallel with the bearing of trend of rotating shaft 3 and on the radiation direction centered by the pivot of rotating shaft 3 (rotor 1) in the one or both ends of the bearing of trend of the rotating shaft 3 of rotor 1.
In addition, the fin of the load-side 10 in the inner fin 6 is called inner fin 6a, the fin of load opposition side 11 is called inner fin 6b.
Shown in Fig. 1 (b), the inner fin 6a of load-side 10 has a plurality of fin 61a, and at least more than one fin 61a is formed slopely from the radiation direction centered by the pivot of rotating shaft 3.Similarly, the rotor 1 of the load opposition side 11 in housing 5 is provided with inner fin 6b, and inner fin 6b has a plurality of fin 61b.
At this, in order to produce based on the efficient mobile of the air in the housing 5 of inner fin 6 and to increase its mixing power, shown in Fig. 1 (b), preferably the whole fin 61 with the inner fin 6 of load-side 10 or load opposition side 11 tilts with same angle (for example, angle [alpha] 1) and to same direction from the radiation direction centered by the pivot of rotating shaft 3.
This is because according to the formula of known Euler's pump, when fin 61 is tilted from the radiation direction centered by the pivot of rotating shaft 3, compare with situation about not tilting, because the mobile angular momentum that applies to the air of internally fin 6 ejection by the rotation of motor increases, therefore air quantity and wind speed increase, thereby the pressure differential of the air stream in the central side of inner fin 6 and the outside increases.
Fig. 2 be the direction of rotation 14 of rotor 1 of expression the first execution mode and inner fin 6a around the A direction of rotor 1 of Fig. 1 (a) of wind direction to view.In addition, in Fig. 2, the direction of rotation 14 (hollow arrow) of rotor 1 and the direction (arrow) of the air stream that inner fin 6 produces are shown.
It is that the whole fin 61a of the inner fin 6a among Fig. 2 tilts to the direction opposite with direction of rotation 14 with respect to the radiation direction centered by the pivot of rotating shaft 3 (among Fig. 2 shown in the dotted line) that inner fin 6 makes whole fin 106a of the inner fin 106 that in the past Fig. 9, the radiation direction of edge centered by rotating shaft 103 shown in Figure 11 form.
At this, as mentioned above, the larger difference of inner fin 6a shown in Figure 2 and Fig. 9 in the past, inner fin 106 shown in Figure 11 is, because inner fin 6 central sides that centrifugal force makes the air that the central side of fin 6 internally sprays laterally increase air quantity and wind speed increase with the pressure differential in the outside.
In addition, tilt from the radiation direction centered by the pivot of rotating shaft 3 by fin 61, reduce near the turbulent flow of fin 61a that consists of inner fin 6a, therefore can flow out efficiently air stream.This situation describes by the formula of known Euler's pump.
Namely, near because flowing from the angle of described radiation direction deflection from fin 6 is different from the angle of described radiation direction deflection to flowing of the outside outflow internally center of inner fin 6, the angular momentum that the air stream of therefore fin 6 internally being discharged applies increases the pressure differential increase in inner fin 6 central sides and the outside.
In addition, by near the generation of the turbulent flow fin 61 central sides that reduce formation inner fin 6, fin 6 sprays air stream efficiently internally.
Namely, when fin 61 is tilted from the radiation direction centered by the pivot of rotating shaft 3, compare with situation about not tilting, because fin 61 is along the direction of air stream, therefore can reduce near the turbulent flow the fin 61 of inner fin 6, fin 6 is discharged air stream efficiently internally, the mixing power of the air of the inner space of raising housing 5.
This effect is can both obtain in left and right sides either party's the situation in the direction that tilts from the radiation direction of fin 61, and no matter how the inclination angle can both obtain, but the size of effect changes according to the rotary speed of rotor 1, thereby preferably suitably regulates the inclination angle.
Consequently, according to this inner fin 6, because inner fin 6 central sides increase with the pressure loss ratio in the outside in the past, and the air quantity of the air stream that sprays because of centrifugal force and wind speed increase, therefore can increase the mixing power that the rotation based on rotor 1 of inner fin 6 produces, improve cooling performance.
In addition, in this totally-enclosedmotor Z, incline direction and the inclined angle alpha 1 with respect to the radiation direction centered by the pivot of rotating shaft 3 that are arranged on the inner fin 6 (6a, 6b) of the end side of bearing of trend of rotating shaft 3 of rotor 1 or both ends side be characterised in that so that the pressure distribution of the air in the space of the load opposition side 11 in the space of the load-side 10 in the housing 5 and the housing 5 separately different mode tilt.The pressure distribution of different air refers to that mixing power axle centered by rotating shaft 3 of load-side 10 and load opposition side 11 air separately becomes asymmetric.
Said mechanism is when for example being separately positioned on load-side 10 and load opposition side 11 with inner fin 6, the fin 61b of the fin 61a of inner fin 6a by making load-side 10 and the inner fin 6b of load opposition side 11 at load-side 10 and load opposition side 11 respectively with the different directions different angle that tilts, produce pressure differential in load-side 10 and load opposition side 11 thus, thereby realize the pressure distribution of different air.
Specifically, so that angle or its direction not identical mode of the fin 61a of the inner fin 6a of load-side 10 from the fin 61b of the angle [alpha] 1 of the radiation direction deflection centered by the pivot of rotating shaft 3 or its direction and the inner fin 6b of load opposition side 11 from the radiation direction deflection centered by the pivot of rotating shaft 3 arranges the inner fin 6a of load-side 10 and the inner fin 6b of load opposition side 11.
According to this structure, rotation by rotor 1, load-side 10 in housing 5 and load opposition side 11 produce pressure differential, the air of the load-side 10 in the housing 5 is passed to the circulation of air of the load opposition side 11 in load opposition side 11 and the housing 5 to load-side 10 by the ventilation hole 15a of rotor 1 and the ventilation hole 15b of stator 2, thereby circulate, can cool off efficiently.
Totally-enclosedmotor Z is by so that the mutually different mode of pressure distribution of the air in the space of the space of the load-side 10 in the housing 5 and load opposition side 11 arranges at least more than one shape and/or the setting position of fin 61 (61a, 61b) of load-side 10 and load opposition side 11 inner fin 6 (6a, 6b) separately, and can promote the circulation via the air of the inside of the housing 5 of ventilation hole 15a, 15b.
Perhaps, in totally-enclosedmotor Z, also can be so that the mutually different mode of pressure distribution of the air in the space of load-side 10 and load opposition side 11 arranges the number of the fin 61 (61a, 61b) of load-side 10 and load opposition side 11 formation inner fin 6 separately.
And in order to keep the easiness of moulding, inner fin 6 preferably has the shape that can not block when the demoulding.
The shape that can not block refers in the moulding of the inner fin 6 that is connected with rotor 1, because therefore the moulding of most employing use mould etc. need to form the shape of taking out from mould easily when moulding.That is, although can form the inner fin 6 with efficient whipping performance by the fin 61 by 3D shape, when take the cost of minimizing moulding during as purpose, the shape that the shape of inner fin 6 preferably can not be blocked.
By this moulding, because the specification when only changing the moulding of inner fin 6 just can realize the present invention, so can realize the significantly reduction of production cost.Need to prove, when the raising of heat dispersion has precedence over production cost, just not limited.
Perhaps, in the rotation owing to rotor 1, when the motor beyond the inner fin 6 that is connected with rotor 1 consists of important document the space of housing 5 inside is stirred, also can so that the not identical mode of the pressure distribution of the air in the space of consequent load-side 10 and load opposition side 11 with motor consist of important document shape, volume, setting position, arrange in the angle any or arbitrarily the load-side 10 of several both sides at rotor 1 axial end portion be arranged to not identical with load opposition side 11.
＜ ventilation hole 15a, 15b 〉
As mentioned above, in totally-enclosedmotor Z, for the inner air that stirs in the space separately of load-side 10 and load opposition side 11 is circulated in the confined space integral body of housing 5 inside, the gap between rotor 1 and stator 2, also have in the inside of the material that forms rotor 1, stator 2, rotating shaft 3 or housing 5 and plurally to make axial ventilation hole 15a, 15b that circulating air ventilates or as the ventilation hole of standard.
＜action effect 〉
According to the totally-enclosedmotor Z of the first execution mode, because the mixing power of the inner air of the housing 5 of the inner fin 6 that is produced by the rotation of rotor 1 increases, so cooling performance improves.And, owing to form the pressure distribution of different air in the space of the space of load-side 10 and load opposition side 11 and can form gradient in the pressure differential in load-side 10 and the space of load opposition side 11, therefore between the space of the space by the load-side 10 housing 5 in and load opposition side 11 plural ventilation hole 15 (15a, 15b) is set, and can be created in the air stream that load-side 10 and load opposition side 11 come and go.
Therefore, can improve the whipping performance of inner fin 6, and the axial length that does not make totally-enclosedmotor Z changes and housing 5 inner airs are circulated in the space of the space of load-side 10 and load opposition side 11, thereby make the heating of part of totally-enclosedmotor Z in the whole homogenizing of motor, and further improve cooling performance.
The＜the second execution mode 〉
Fig. 3 is that the A direction of Fig. 1 (a) of rotor 21 of the second execution mode is to view.
The inner fin 26 of the rotor 21 of the second execution mode forms the structure that the incline direction of the fin 61a of the inner fin 6a that makes the first execution mode shown in Figure 2 tilts towards direction of rotation 24.In this inner fin 26, also with the inner fin 6a shown in Figure 2 of the first execution mode similarly, since centrifugal force and internally the pressure differential in inner fin 26 central sides of the air that sprays laterally of the central side of fin 26 and the outside increase air quantity and wind speed increase.In addition, by near the generation of the turbulent flow the central side that reduces inner fin 26, and fin 26 sprays air stream efficiently internally.
Consequently, inner fin 26 according to the second execution mode, because the central side of inner fin 26 increases with the pressure loss in outside ratio in the past, and the air quantity of the air stream that sprays owing to centrifugal force and wind speed increase, and therefore can increase the mixing power of the air in the housing that the rotation based on rotor 21 of inner fin 26 produces and improve cooling performance.
The＜the three execution mode 〉
Fig. 4 (a) is the axial longitudinal section of the totally-enclosedmotor 3Z of the 3rd execution mode, and Fig. 4 (b) is that the B direction of rotor 31 of Fig. 4 (a) is to view.
Shown in Fig. 4 (b), inner fin 36b (36) fin 361a, the 361b separately that the totally-enclosedmotor 3Z of the 3rd execution mode makes the inner fin 36a (36) of the load-side 10 on the two ends of the axial end portion that is arranged on rotor 31 and load opposition side 11 is from the same angle of inclined in opposite directions respectively of the radiation direction centered by the pivot of rotating shaft 33 (rotor 31).At the inner fin 36a of load-side 10 from the inclination angle of radiation direction deflection be+during θ, the inner fin 36b of load opposition side 11 from the inclination angle of radiating the direction deflection is-θ.
In addition, rotor 31 near the part of rotating shaft 33 on along the bearing of trend of rotating shaft 33 ventilation hole 35a is set, and, stator 32 near the part of housing 35 inwalls on along the bearing of trend of rotating shaft 33 ventilation hole 35b is set.
Consequently, in the totally-enclosedmotor 3Z of the 3rd execution mode, the central side of load-side 10, load opposition side 11 inner fin 36 (36a, 36b) separately and the pressure differential in the outside increase, because the air quantity of the air stream of centrifugal force and internally fin 36 ejection and wind speed increase when using in the past inner fin 106 shown in Figure 9, therefore near the mixing power the inner fin 36 (36a, 36b) in the space of the space of the load-side 10 in the housing 35 and load opposition side 11 increases, and cooling performance improves.
In addition, because the bearing of trend near the rotating shaft 33 of the part of housing 35 inwalls near the part of rotating shaft 33 and stator 32 at rotor 31 is respectively equipped with ventilation hole 35a, 35b, therefore for example when the pressure differential of the central side of the inner fin 36a of load-side 10 and outer circumferential side during greater than the pressure differential of the central side of the inner fin of load opposition side 11 and outer circumferential side, if for example form the high barometric gradient of load opposition side 11 pressure between the inner fin 36b central side of the inner fin 36a central side of load-side 10 and load opposition side 11, then the part of the air stream of the inner fin 36b central side of load opposition side 11 is by being arranged on ventilating to the inner fin 36a central side of load-side 10 near the ventilation hole 35a on the part of rotating shaft 33 of rotor 31.And, because flowing into the air capacity of the inner fin 36a of load-side 10 increases, therefore the air capacity from the inner fin 36a ejection of load-side 10 increases, air pressure in the space of load-side 10 raises, thereby ventilates to load opposition side 11 from the part of the air stream of the inner fin 36a ejection of the load-side 10 ventilation hole 35b near the part of the inwall of housing 35 by stator 32.
Therefore, owing to the load-side 10 of the inside that can be formed in housing 35 and the air stream of load opposition side 11 circulations, therefore can access the cooling effect that surpasses in the past.And, because also flow circuit stream around the coil-end 39e and in the space between the housing 35, therefore can be reduced the effect of local pyrexia.
And, in the totally-enclosedmotor 3Z of the 3rd execution mode, make inner fin 36a and the load opposition side 11 of load-side 10 the same angle of inner fin 36b inclined in opposite directions (+θ ,-θ) (with reference to Fig. 4 (b)).Therefore, with respect to positive and negative rotation, the flow of the air of circulation is different in load-side 10 and load opposition side 11 near inner fin 6, but because the air stream that circulates via ventilation hole 15a, 15b between the load-side 10 of the inside of housing 5 and load opposition side 11 is arranged, therefore this flow with respect to about rotation (positive and negative rotation) equate, can access identical cooling performance thus.
Therefore, with respect to the rotation about totally-enclosedmotor 3Z (positive and negative rotation), at the constant flow of the air of the inner loop of housing 35, no matter how direction of rotation can both obtain identical cooling performance.
The＜the four execution mode 〉
Fig. 5 is the axial longitudinal section of the totally-enclosedmotor 4Z of the 4th execution mode.
Totally-enclosedmotor 4Z makes the axial length of the inner fin 46b that is connected with rotor 41 of load opposition side 11 than the axial length structure in short-term of the inner fin 46a of load-side 10, and other structure is identical with the structure shown in Figure 4 of the 3rd execution mode.
Totally-enclosedmotor 4Z according to the 4th execution mode, although the air stream of circulation reduces near the inner fin 46b of load opposition side 11, but owing in the inner air in load-side 10 and each space of load opposition side 11, produce pressure differential, therefore the air of the inside of housing 45 circulates by the ventilation hole 45a that is formed at rotor 41 and the ventilation hole 45b that is formed at stator 42, thereby can improve cooling performance.
In addition, owing to shortened the axial length of the inner fin 46b of load opposition side 11, therefore can reduce the materials'use amount of inner fin 46b, thereby reduce cost.
In addition, at the axial length of the inner fin 46a that makes load-side 10 than the axial length of the inner fin 46b of load opposition side 11 in short-term, also can obtain same cooling effect and cost effect.
The＜the five execution mode 〉
Fig. 6 is the axial longitudinal section of the totally-enclosedmotor 5Z of the 5th execution mode.
The totally-enclosedmotor 5Z of the 5th execution mode is that the fin count of the inner fin that is connected with rotor 51 of load opposition side 11 is 0 o'clock structure, and other structure is identical with the structure of the 3rd execution mode shown in Figure 4.
Totally-enclosedmotor 5Z according to the 5th execution mode, although the air stream that inner fin position Flow Structure Nearby is set at load opposition side 11 reduces, but owing to produce air stream by the inner fin 56a of load-side 10, therefore produce pressure differential in the inner air of the load-side in housing 55 10 and load opposition side 11, ventilation hole 55a and the ventilation hole 55b of stator 52 and in the inner loop of housing 55 of inner air by rotor 51, thus cooling performance can be improved.In addition, owing to only inner fin 56a is arranged on load-side 10, therefore can reduce the materials'use amount for the manufacture of inner fin, thereby reduce cost.
In addition, when changing Fig. 6 into, be 0 and be provided with at load opposition side 11 in the situation of fin of inner fin at the number of the fin 561a of the inner fin 56a that makes load-side 10, also can obtain same cooling effect and cost effect.
The＜the six execution mode 〉
Fig. 7 (a) is the axial longitudinal section of the totally-enclosedmotor 6Z of the 6th execution mode, and Fig. 7 (b) is that the C direction of rotor 61 of Fig. 7 (a) is to view.
The totally-enclosedmotor 6Z of the 6th execution mode makes the load-side 10 of shape in housing 65 of end ring 61e, conductor 61d etc. of constitutive requirements such as the rotor 61 that consists of totally-enclosedmotor 6Z different with load opposition side 11.
Other structure is identical with described execution mode.
Totally-enclosedmotor 6Z according to the 6th execution mode, because load-side 10 in housing 65 makes the shape of constitutive requirements of the totally-enclosedmotor 6Z such as end ring 61e, conductor 61d different with load opposition side 11, therefore when rotor 61 rotation, can produce barometric gradient in the space of the load-side 10 in housing 65 and the space of load opposition side 11.Therefore, inner air by rotor 61 ventilation hole 65a and the ventilation hole 65b of stator 62 in the inner loop of housing 65, thereby can improve cooling performance.
In addition, because the shape of the constitutive requirements of the rotor 61 of load opposition side 11 is less than the shape of the constitutive requirements of the rotor 61 of load-side 10, therefore can reduce the material amount use amount of rotor 61, thereby reduce cost.
In addition, in the 6th execution mode, as the constitutive requirements that consist of totally-enclosedmotor 6Z, illustration end ring 61e, conductor 61d, but the constitutive requirements that also can make the formation totally-enclosedmotor 6Z beyond end ring 61e, the conductor 61d in the both sides of the bearing of trend end of the rotating shaft 63 of rotor 61 mutually each other different shape and volume, different setting position, different arrange angle any or several arbitrarily.
For example, also can make other the load-side 10 of constitutive requirements in housing 65 such as the constitutive requirements of the rotor 61 beyond end ring 61e, the conductor 61d, the shape of stator 62, the interior shape of housing 65 different with load opposition side 11.For example, also can be so that the mode that the volume (volume) of load-side 10 and load opposition side 11 changes form the interior shape of housing 65, and increase the barometric gradient of load-side 10 and load opposition side 11.
The＜the seven execution mode 〉
Fig. 8 is the axial longitudinal section of the totally-enclosedmotor 7Z of the 7th execution mode.
In the totally-enclosedmotor 7Z of the 7th execution mode, be provided with groove that the bearing of trend with respect to rotating shaft 73 (pivot of rotor 71) of helical form etc. tilts or as the ventilation hole 75a of standard at the outer surface of columned rotor 71 roughly.In addition, in Fig. 8, represent the flowing of air of the inside of housing 75 by arrow.
The ventilation hole 75a of rotor 71 is arranged to, and the pressure differential in inner fin 76 central sides of an axial end side of the rotor 71 of inner air inflow ventilation hole 75a and the outside is greater than inner fin 76 central sides of axial the other end side of the rotor 71 of inner air outflow side and the pressure differential in the outside by the rotation of rotor 71.Other structure is identical with the structure of the totally-enclosedmotor 3Z of the 3rd execution mode shown in Figure 4.
The difference of the effect of the 5th execution mode of the 3rd execution mode of the effect of present embodiment and Fig. 4, the 4th execution mode of Fig. 5, Fig. 6 is that the ventilation hole 75a that flows through to axial owing to the rotation of rotor 71 in load- side 10 and 11 ventilations of load opposition side produces automatically.And air ventilates and flows out to the axial outside of another distolateral rotor 71 from axial one of rotor 71 distolateral flow ventilation hole, outside 75a, and the ventilation hole 75b by stator 72, refluxes thereby form.
Totally-enclosedmotor 7Z according to the 7th execution mode, with only comparing based on the air capacity of the circulating air of the barometric gradient of load-side 10 and load opposition side 11 of Fig. 4, Fig. 5, shown in Figure 6 third and fourth, five execution modes, air quantity at the air stream of the inner body of housing 75 circulation increases, and therefore can access higher cooling effect.
In addition, with respect to the rotation about rotor 71 (positive and negative rotation), owing to flow into the pressure differential that pressure differential that the inner fin 76a of ventilation hole 75a one side be arranged at rotor 71 produces produces greater than the inner fin 76b of outflow side, therefore at the constant flow of the air stream of the inner loop of housing 75, thereby can access the whole identical cooling performance of totally-enclosedmotor 7Z.
In addition, in the 7th execution mode, illustration ventilation hole 75a is formed the spiral helicine groove that tilts with respect to rotating shaft 73 or as the situation of the ventilation hole of standard at the outer surface of rotor 71, but also can form in the inside of rotor 71 hole etc. of helical form that the bearing of trend with respect to rotating shaft 73 tilts etc. or as the ventilation hole of standard.
＜action effect 〉
According to above-mentioned execution mode, can improve the mixing power of the enclosure interior air that is produced by inner fin, and can not increase the axial length of totally-enclosedmotor and the both sides that are implemented in rotor and stator shaft orientation end ventilate, the air stream of circulation.
Therefore, the mixing power in the space of the enclosure interior that is produced by the rotation of rotor increases, and is created in the air stream of enclosure interior circulation, therefore improves the cooling performance of totally-enclosedmotor.
Therefore, can provide a kind of minimizing of increase, area of dissipation of the heat generation density with respect to totally-enclosedmotor and the decline of the cooling performance that causes, small-sized, the light-weighted totally-enclosedmotor that also reduced realization that excessive temperature rises.
In addition, in the first～seven execution mode, various structures have been described respectively, but also can be with described structure appropriate combination.The effect that thus, can obtain making up.
Claims (3)
1. totally-enclosedmotor possesses: be arranged in the housing and transmit rotor and the stator of its heat to described housing; Be formed on the described rotor and stir the inner fin of the air in the described housing,
Cool off by being arranged on forced convertion that the outer external fan of described housing produces or near the free convection the described housing outer surface,
Described totally-enclosedmotor is characterised in that,
Described rotor has different shapes in an end side of the bearing of trend of its rotating shaft with the other end side,
Described inner fin has the both ends side of bearing of trend of the rotating shaft that is formed on described rotor and at least more than one the fin that tilts with respect to the radiation direction centered by the pivot of described rotating shaft,
At least more than one the fin that consists of described inner fin tilts with respect to described radiation direction and is, the pressure distribution of the air in two spaces of the bearing of trend both ends side of the rotating shaft of described rotor that makes that rotation by described rotor produces is different
The inclination with respect to described radiation direction of the fin of at least more than one of one end side of the bearing of trend of the rotating shaft of described rotor and each described inner fin of the other end side is reverse each other same angle,
In described rotor, described stator, described rotating shaft, described housing any or arbitrarily several on, the gap between described rotor and described stator, also be provided with the ventilation hole in the outside at the bearing of trend both ends of the plural at least rotating shaft that penetrates into described rotor
The axial length of the described inner fin of one end side of the bearing of trend of the rotating shaft of described rotor is shorter than the axial length of the described inner fin of the other end side of the bearing of trend of the rotating shaft of described rotor.
2. totally-enclosedmotor according to claim 1 is characterized in that,
Described ventilation hole is formed obliquely outer surface or inside at described rotor with respect to the bearing of trend of described rotating shaft.
3. totally-enclosedmotor according to claim 2 is characterized in that,
Described ventilation hole forms spiral helicine groove at the outer surface of described rotor.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010013822A JP5297398B2 (en) | 2010-01-26 | 2010-01-26 | Fully closed motor |
| JP2010-013822 | 2010-01-26 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102136780A CN102136780A (en) | 2011-07-27 |
| CN102136780B true CN102136780B (en) | 2013-10-30 |
Family
ID=44296454
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011100295714A Expired - Fee Related CN102136780B (en) | 2010-01-26 | 2011-01-24 | Totally enclosed motor |
Country Status (3)
| Country | Link |
|---|---|
| US (1) | US8502425B2 (en) |
| JP (1) | JP5297398B2 (en) |
| CN (1) | CN102136780B (en) |
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|---|---|---|---|---|
| US20130002067A1 (en) * | 2011-06-30 | 2013-01-03 | Bradfield Michael D | Electric Machine Module Cooling System and Method |
| CN102394534A (en) * | 2011-12-02 | 2012-03-28 | 乔长明 | Self-cooling motor |
| JP2014033584A (en) * | 2012-08-06 | 2014-02-20 | Fuji Electric Co Ltd | Wind cooling structure of rotary electric machine |
| US9680351B2 (en) * | 2013-03-15 | 2017-06-13 | Ingersoll-Rand Company | Electrical machine having cooling features |
| JP5864029B2 (en) * | 2013-04-15 | 2016-02-17 | 三菱電機株式会社 | Rotating electric machine |
| CN103746485B (en) * | 2013-12-24 | 2016-08-31 | 上海电机系统节能工程技术研究中心有限公司 | A kind of cooling structure of permagnetic synchronous motor |
| EP3046228A1 (en) * | 2015-01-14 | 2016-07-20 | Siemens Aktiengesellschaft | A generator rotor for an electric generator and a method for construction thereof |
| US10598443B2 (en) | 2015-07-06 | 2020-03-24 | General Electric Company | Thermal management system |
| DE102015215009A1 (en) * | 2015-08-06 | 2017-02-09 | Continental Automotive Gmbh | Air-cooled electric motor with a parallel connection of two fan wheels |
| KR102579568B1 (en) * | 2015-11-12 | 2023-09-18 | 엘지이노텍 주식회사 | Busbar and Motor having the same |
| CN107237685A (en) * | 2016-03-28 | 2017-10-10 | 长城汽车股份有限公司 | Supercharger assembly and the gas handling system with it |
| JP6586436B2 (en) * | 2017-04-25 | 2019-10-02 | 東芝三菱電機産業システム株式会社 | Rotating electric machine and its rotor |
| DE102017210977A1 (en) * | 2017-06-28 | 2019-01-03 | Robert Bosch Gmbh | compressor machine |
| CN108312018B (en) * | 2018-03-07 | 2023-10-13 | 浙江亚特电器股份有限公司 | Hand-held electric tool |
| CN113794313A (en) * | 2021-09-22 | 2021-12-14 | 中车株洲电机有限公司 | Air-cooled motor |
| FR3128078A1 (en) | 2021-10-12 | 2023-04-14 | Nidec Psa Emotors | Flange for rotating electrical machine |
| DE102022201980A1 (en) * | 2022-02-25 | 2023-08-31 | Siemens Mobility GmbH | Encapsulated electric machine with efficient internal circuit cooling |
| CN115043299B (en) * | 2022-06-30 | 2023-11-10 | 日立电梯电机（广州）有限公司 | Traction machine and elevator |
| WO2024077248A1 (en) * | 2022-10-06 | 2024-04-11 | Archer Aviation Inc. | Systems, methods, and mechanical designs for inverters for evtol aircraft |
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Also Published As
| Publication number | Publication date |
|---|---|
| JP5297398B2 (en) | 2013-09-25 |
| US20110181138A1 (en) | 2011-07-28 |
| CN102136780A (en) | 2011-07-27 |
| US8502425B2 (en) | 2013-08-06 |
| JP2011155720A (en) | 2011-08-11 |
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